File indexing completed on 2024-12-22 05:36:21

 <?php
 
 /**
  * Represents a pre or post processing filter on HTML Purifier's output
  *
  * Sometimes, a little ad-hoc fixing of HTML has to be done before
  * it gets sent through HTML Purifier: you can use filters to acheive
  * this effect. For instance, YouTube videos can be preserved using
  * this manner. You could have used a decorator for this task, but
  * PHP's support for them is not terribly robust, so we're going
  * to just loop through the filters.
  *
  * Filters should be exited first in, last out. If there are three filters,
  * named 1, 2 and 3, the order of execution should go 1->preFilter,
  * 2->preFilter, 3->preFilter, purify, 3->postFilter, 2->postFilter,
  * 1->postFilter.
  *
  * @note Methods are not declared abstract as it is perfectly legitimate
  *       for an implementation not to want anything to happen on a step
  */
 
 class HTMLPurifier_Filter
 {
 
     /**
      * Name of the filter for identification purposes.
      * @type string
      */
     public $name;
 
     /**
      * Pre-processor function, handles HTML before HTML Purifier
      * @param string $html
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return string
      */
     public function preFilter($html, $config, $context)
     {
         return $html;
     }
 
     /**
      * Post-processor function, handles HTML after HTML Purifier
      * @param string $html
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return string
      */
     public function postFilter($html, $config, $context)
     {
         return $html;
     }
 }
 
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